Plants 18–45 cm. Leaves 2, in subequal basal pair, spreading-ascending or lying on ground; bracts 0(–1, very rarely); blade orbiculate, broadly elliptic, or obovate, 5–17 × 4–13 cm. Spikes lax. Flowers resupinate, not showy; calyx green; corolla commonly yellowish green; lateral sepals reflexed; petals narrowly lanceolate-falcate, margins entire; lip projecting to porrect, lanceolate to narrowly lance-rhombic, without basal thickening, 8–23 × 1–6 mm, margins entire; spur slenderly conic, 11–27 mm; rostellum lobes very wide-spreading, angular; pollinaria nearly straight; pollinia remaining enclosed in anther sacs; viscidia suborbiculate; ovary slender to rather stout, mostly 8–20 mm. 2n = 42.
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